<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script type="text/javascript">
    var i;
    var result=0;
    for(i=1;i<=100;i++){
        result=result+i;
    }
    document.write("1到100的累加和是："+result);
    </script>
</head>
<body>
    
</body>
</html>